import java.util.Scanner;

public class test11 {
    public static void main(String[] args){
        Scanner scan=new Scanner(System.in);
        System.out.println("请输入您的选择");
        int number;
        number= scan.nextInt();
        switch (number) {
            case 1:
                System.out.println("机票查询");
                break;
            case 2:
                System.out.println("机票预定");
                break;
            case 3:
                System.out.println("机票改签");
            default:
                System.out.println("退出服务");

        }
    }
}
